Hate to say it ... but I think I am opposed to the state killing convicted murders also.
I think a much better solution would be to turn the perp over to the victoms survivors and let them decide if they choose to keep him alive, feed him, shelter him, provide all his support for the remander of his life ... or whatever other action they choose to take.
If they choose pliers and a blowtorch its none of our business ... we were not the injured party.